*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

.w100{
    width: 100%;
}

.h100{
    height: 100%;
}

.page-content{
    margin: 0 auto;
    width: 1200px;
    height: 100%;
}

.border{
    border: 1px solid black;
}

.flex{
    display: flex;
}

.flex-column{
    flex-direction: column;
}

.flex-wrap{
    flex-wrap: wrap;
}

.jc-center{
    justify-content: center;
}
.jc-end{
    justify-content: end;
}
.jc-start{
    justify-content: start;
}
.jc-around{
    justify-content: space-around;
}
.jc-between{
    justify-content: space-between;
}
.ai-center{
    align-items: center;
}
